某尾矿坝的有限元计算分析

Finite element calculation and analysis of a tailings dam

基于坝体分区分层填筑和坝体材料非线性,采取材料分区和逐级施加荷载的方式建立尾矿坝有限元计算模型,并进行计算分析。计算结果表明该尾矿坝的变形与应力与尾矿坝的复杂地形地质条件相适应,分布较为复杂;各分区与坝基之间的变形基本协调,应力从坝顶到坝基逐渐增大,应力分布符合一般规律。剪应力水平小于1.0,未发现剪切破坏单元,但坝基含砾粉质粘土层的剪应力水平相对较高。

The finite element calculation model of tailings dam was established and evaluated based on the dam fill in different partitions and layers and nonlinear materials by material paItition and loading step by step. The calculation results show that the complex distribution of deformation and stress of the tailings dam adapts to complex topographic and geological conditions, the deformation between the partitions and the dam foundation is basically coordinated, the stress increases gradually from the top of the dam to dam foundation, and the stress distribution accords with the general law. The shear stress level is less than 1. O, and no shear failure unit has been found. However, the shear stress level of the gravel silty clay layer in the dam foundation is relatively high.